Troubleshooting Guide

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Table Of Contents

Contents
Chapter 1: Introduction
- Purpose
- Related resources
- Support
Chapter 2: Safety messages
- Notices
Chapter 3: New in this document
- Features
Chapter 4: Data collection required for Technical Support cases
- Data collection for an outage
  - Collecting data before you restart
  - Collecting data after you restart
- Data collection for non outage problems
  - Gathering critical information
Chapter 5: Troubleshooting planning fundamentals
- Proper installation and routine maintenance
- Network configuration
- Normal behavior on the network
Chapter 6: Troubleshooting fundamentals
- Connectivity problems
- Routing table problems
- LED indications of problems
- Cable connection problems
- Alarm database
Chapter 7: Troubleshooting tool fundamentals
- Troubleshooting overview
- Digital Diagnostic Monitoring
- Flight Recorder
- Port mirroring
- General diagnostic tools
Chapter 8: Log and trap fundamentals
- Overview of traps and logs
- Secure syslog
- Simple Network Management Protocol
- Log message format
- Log files
- Log file transfer
Chapter 9: Log configuration using ACLI
- Configuring a UNIX system log and syslog host
  - Job aid
- Configuring secure forwarding
  - Variable definitions
- Installing root certificate for syslog client
  - Variable definition
- Configuring logging
- Configuring the remote host address for log transfer
- Configuring system logging to external storage
- Configuring system message control
- Extending system message control
- Viewing logs
- Configuring ACLI logging
Chapter 10: Log configuration using EDM
- Configuring the system log
- Configuring the system log table
Chapter 11: SNMP trap configuration using ACLI
- Configuring an SNMP host
- Configuring SNMP interfaces
- Enabling SNMP trap logging
Chapter 12: SNMP trap configuration using EDM
- Configuring an SNMP host target address
- Configuring target table parameters
- Configuring SNMP notify filter profiles
- Configuring SNMP notify filter profile table parameters
- Enabling authentication traps
Chapter 13: Traps reference
- Proprietary traps
- Standard traps
Chapter 14: Hardware troubleshooting
- Using trace to diagnose hardware problems
- Troubleshooting USB viewing problems
Chapter 15: Software troubleshooting
- Failure to read failed configuration file
- No Web management interface access to a device
- Cannot enable encryption
- Debug files
Chapter 16: Software troubleshooting tool configuration using ACLI
- Using ACLI for troubleshooting
- Using software record dumps
- Using trace to diagnose problems
- Using trace to diagnose IPv6 problems
- Viewing and deleting debug files
- Configuring port mirroring
- Configuring global mirroring actions with an ACL
- Configuring ACE actions to mirror
- Clearing ARP information for an interface
- Flushing routing, MAC, and ARP tables for an interface
- Pinging an IP device
- Running a traceroute test
- Showing SNMP logs
- Using trace to examine IS-IS control packets
- Viewing the metric type of IS-IS route in TLVs – detailed
- Viewing the metric type of IS-IS route in TLVs – summarized
Chapter 17: Software troubleshooting tool configuration using EDM
- Flushing routing tables by VLAN
- Flushing routing tables by port
- Configuring port mirroring
- Configuring ACLs for mirroring
- Configuring ACEs for mirroring
- Running a ping test
- Viewing ping results
- Viewing ping probe history
- Running a traceroute test
- Viewing traceroute results
- Viewing the traceroute history
Chapter 18: Layer 1 troubleshooting
- Troubleshooting fiber optic links
Chapter 19: Operations and Management
- CFM fundamentals
- CFM configuration using ACLI
- CFM configuration using EDM
- CFM configuration example
  - CFM configuration example
  - CFM sample output
Chapter 20: Upper layer troubleshooting
- Troubleshooting SNMP
- Troubleshooting DHCP
- Troubleshooting DHCP Relay
- Troubleshooting client connection to the DHCP server
- Troubleshooting IPv6 DHCP Relay
- IPv6 DHCP Relay switch side troubleshooting
- IPv6 DHCP Relay server side troubleshooting
- IPv6 DHCP Relay client side troubleshooting
- Enabling trace messages for IPv6 DHCP Relay
- Troubleshooting IPv6 VRRP
- VRRP transitions
- Enabling trace messages for IPv6 VRRP troubleshooting
- Risks associated with enabling trace messages
- VRRP with higher priority running as backup
- Downgrading or upgrading from releases that support different key sizes
- Troubleshooting IPv6 connectivity loss
- Troubleshooting TACACS+
- Troubleshooting RSMLT
Chapter 21: Unicast routing troubleshooting
- Using BGP debugging commands
- Troubleshooting licensed features
- Viewing OSPF errors
- Viewing OSPF neighbor state problems
- Troubleshooting OSPF Init state problems
- Troubleshooting OSPF ExStart/Exchange problems
Chapter 22: Multicast troubleshooting
- Multicast feature troubleshooting
  - Troubleshooting IGMP Layer 2 Querier
    - Querier not elected
    - Enabling trace messages for IGMP Layer 2 querier troubleshooting
  - Troubleshooting IGMPv3 backwards compatibility
Chapter 23: Multicast routing troubleshooting using ACLI
- Viewing IGMP interface information
- Viewing multicast group trace information for IGMP snoop
- Viewing IGMP group information
- Showing the hardware resource usage
- Using PIM debugging commands
- Determining the protocol configured on the added VLAN
- Determining the data stream learned with IP Multicast over Fabric Connect on the VLAN
- Displaying the SPBM multicast database
- Troubleshooting IP Multicast over Fabric Connect for Layer 2 VSNs
- Troubleshooting IP Multicast over Fabric Connect for Layer 3 VSNs
- Troubleshooting IP Multicast over Fabric Connect for IP Shortcuts
- Defining the IS-IS trace flag for IP multicast
Chapter 24: Multicast routing troubleshooting using EDM
- Viewing IGMP interface information
- Viewing IGMP snoop trace information
- Viewing IGMP group information
- Viewing multicast group sources
- Viewing multicast routes by egress VLAN
- Enabling multicast routing process statistics
- Determining the data stream learned when IP Multicast over Fabric Connect is configured on the VLAN
- Showing the SPBM multicast database
Chapter 25: Transparent Port UNI feature troubleshooting using ACLI
- Viewing all configured I-SIDs
- Viewing C-MACs learned on T-UNI ports for an ISID
- Viewing I-SID maximum MAC-limit
Chapter 26: Troubleshooting MACsec
- Viewing the MACsec connectivity association details
- Viewing MACsec status
Chapter 27: Troubleshooting MACsec using EDM
- Viewing MACsec connectivity association details
Chapter 28: Troubleshooting Fabric Attach
- Troubleshooting Fabric Attach using the ACLI
- Troubleshooting Fabric Attach using the EDM
- Fabric Attach troubleshooting example
  - Troubleshooting FA Server rejection of I-SID-to-VLAN assignments using trace

Chapter 14: Hardware troubleshooting

The following sections provide troubleshooting information for common hardware problems.

Using trace to diagnose hardware problems

Before you begin

• You must log on to the Privileged EXEC mode in ACLI.

About this task

Use trace to observe the status of a hardware module at a given time.

Procedure

1. Begin the trace operation:

line-card 1 trace level [{67–179} {0–4}]

2. Search the trace for a specific string value:

line-card 1 trace grep [WORD<0–1024>]

Example

VSP-4850GTSPWR+:1>enable

Begin the trace operation:

VSP-4850GTSPWR+:1#line-card 1 trace level 67 1

Search the trace for a specific string value:

VSP-4850GTSPWR+:1#line-card 1 trace grep 00-1A-4B-8A-FB-6B

Variable definitions

Use the data in the following table to use the line-card 1 command.

January 2017 Troubleshooting 91

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